clc
clear
N=20;

%N
controlPoint=[0.5?2;1?16;1.5?-3;2?18];
knots=[1?1?2?3?4?5?6?17];
knotSt=2;
knotEn=5;

%U
%?controlPoint=[1?26;0.5?2;1.5?0;2.5?2;3?26];
%?knots=[1?1?2?3?4?5?6?8];
%?knotSt=1;
%?knotEn=7;

%R
%?controlPoint=[0?0;1?5;1.5?15;4?9;-0.5?8;5?0];
%?knots=[0?0?3?5?5?5?7?7?9?13?16];
%?knotSt=1;
%?knotEn=10;

%B
%?controlPoint=[1?0;2.5?16;9?12;-1.5?9;8?7;1?0]